build_errors: Builds a dataframe of errors
In logib: Salary Analysis by the Swiss Federal Office for Gender Equality

build_errors builds a dataframe of errors as used by the function check_data.

1	build_errors(rows, pers_id, vals, column, description, importance)

`rows`	a vector of numbers representing the rows which contain an error
`pers_id`	a vector of strings of the personal ID which contain an error
`vals`	a vector of the erroneous values
`column`	the name of the column containing the error
`description`	the description of the error occurring
`importance`	the importance of the error occurring